Explanation : We have 8 pages in the memory and 4 blocks: 0-1023 (0) 1024-2047 (1) 2048-3071 (2) 3072-4095 (3) 4096-5119 (4) 5120-6143 (5) 6144-7167 (6) 7168-8191 (7) option (A) will string 1,3,4,6 so page fault will occur. option (B) will string 1,3,4,6 so page fault will occur. option (C) will string 0,2,5,7 so page fault will occur. option (D) will string 1,3,4,6 so page fault will occur. So, option (C) is correct.